Work gauge



E. S. CORNELL Sept. 21, 1948.

WORK GAUGE 3 Sheets- Sheet 1 Filed. Oct. 6, 1943 Sept. 21, 1948. E. s.CORNELL WORK GAUGE 3 Sheets-Sheet 2 Filed Oct. 6, 1943 Sept. 21, 1948.

E. S. CORNELL WORK GAUGE- 3 Shecs-Sheet s Filed Oct. 6, 194:5

Patented Sept. 21, 1948 WORK GAUGE Elton S. Cornell, Charlestown, N. H.,assignor to Bryant Chucking Grinder Company, Springfield, Vt., acorporation of Vermont 4 Application October 6, 1943, Serial No. 505,170

4 Claims.

In the gaging of peripherally grooved or threaded work, where the gagingaction is desired within the grooves or between the threads, it isevident that during a gaging action, the work piece being gaged is heldagainst removal by the gaging elements. Where less than all of the gageelements or anvils are retracted from contact with the work when thegage is opened after a gaging action. lateral motion of the work pieceaway from the fixed gaging element or elements is required to free ittherefrom. When the work piece is supported for gaging on a fixedmember, this lateral motion of the work piece is accompanied by africtional sliding motion of the work piece on its supporting member,first toward the fixed element or elements as the movable element orelements are moved into gaging position, and then in the oppositedirection to free the work piece for removal. Particularly when the workpiece is heavy, this frictional drag may interfere with complete motionof the work piece to gaging position, resulting in an inaccurate gaging,and it adds to the labor in placing and removing the work pieces to beor which have been gaged.

An object of the present invention, therefore, is to provide a supportfor the work piece which is movable therewith between gaging and loadingpositions for the work and without substantial friction.

A further object of the invention is to so mount the work piece supportthat not only may it move with the work piece between gaging andreleasing positions, but which is also yieldable laterally of such workpiece motion, this lateral motion commonly being vertical, to facilitateproper engagement of the gaging elements or anvils within the workgrooves or between the threads, preventing cross threading of threadedwork,

For a complete understanding of this invention, reference may be had tothe accompanying drawings in which Figure 1 is a fragmentary top planview of an external thread gage embodying this invention.

Figures 2 and 3 are sectional views on lines 2-4 and 3-3, of Figures 1and 2, respectively,

Figure 4 is a view similar to Figure 1, but showing the inventionembodied in an internal thread gage.

Figure 5 is a sectional view on line 55 of Figure 4.

Figure 6 is a detail sectional view on line 66 of Figure 5.

Figure 7 is a fragmentary view similar to a portion of Figure 1, butshowing a modification.

fixed to the top face of the bed I as by screws 4.

At 5 is shown a movable anvil, this being carried by an arm 6 which maybe pivoted as by crossed leaf springs I from an upright support 8 toswing in a horizontal plane toward and from the fixed anvils 2, asuitable indicator 9 actuated by motion of the arm 6, as is wellunderstood in the art, being employed to show the gaged diameter of thework when all threeof th'e anvils are in engagement therewith. Thesegaging elements may be mounted in any suitable manner, the particularmounting not being per se a part of the present invention. It will beevident, however, that work being in gaging relation to the anvils, asshown at It] in Figure 2, when the movable anvil is moved away from thework itreleases the work therefrom, but the work is still in engagementwith the fixed anvils 2 which engage between the external threads of thework, or in case of externally grooved work within the work grooves, andthe work is therefore not free to be lifted off from the gage until itis moved laterally out of contact with the fixed anvils.

In accordance with this invention the work is supported for gaging on asupport l2 carried by a platform I3. This platform I3 is provided with apair of downwardly extending feet l4, each of which rests at its lowerends on the upper leaf l6 of a cross spring strip l1 secured thereto asby screws l5. The opposite ends of the springs 1 are bent upwardly at l8and the upper extremities of these strips are turned outwardly anddownwardly as at l9 and are pivotally supported in grooves 20 in theupper face of a pairof cross frame members 2| bridging depressed wallportions 22 of the bed I. Stop lugs 23 depending from the platform l3above the member 2| limit the downward motion of the platform. Above thebends l8 these spring strips or hangers l! are shown as thinned as at25, these thin portions providing points of fiexure of the strips so asto permit the lower portions of the strip I1 tobe deflected laterally.These, thin portions 25 are arranged to flex in the direction of motionof the work piece when moving toward or from the fixed anvils 2 andprovide for the work support l2 a substantially frictionless laterallyyleldable mounting having some tendency to take a mid position, with thework clearing the fixed anvils, but yieldable readily when the movableanvil 5 presses th'ereagainst to move the work into engagement with thefixed anvils 2, this being a gaging position for the work piece.Likewise the work support is yieldable vertically through its springsupporting hangers so that proper engagement of the anvils with thefaces of'the threads or in grooves in-th'ework may be insured andwithout liability of cross threading of threaded work.

In Figures 4 to 6 a modification is shown particularly suitable forgaging internally threaded or grooved work. The stand 59 for this gagecarries an arcuate support 5| totthelunderfacecor which is secured ayoke shaped "plate "as by screws 53, this plate 52 having a pair ofupstanding portions 54 to the upper faces-of which are secured a pair offixed gaging anvils 55 for engagement with internal thread faces of thework 69. At 6! is shown a .movable gaging lever to which :is secured a:member 62 having an upstanding arm 63 to one end of whichis-secured.aim'ovable :anvilt l. {This arm $3 also-has atits opposite end apilotportion 55, which, when the gage :is opened, "engages with a smooth faceagainst theqinternal threads of the workpiece and may cretract itfrom-contactwiththe stationary thread gaginganvilsfifi. The work til-isarranged to ibe'supportedron an'annular. platform 7 which is supportedfrom the member t by tour U shaped leaf spring hangers 75. Each of-theseleaf springs has :a :vertical arm 76 secured to the outerredge of-the:Worksupp'ort "id and a vertical arm 'il thet'loWer end ofwhich isturned inwardlyqandsecured tothe-top-iaceoi the member'l'il as by thescrews 79. These :springsupports .i'lil'permit'thework to .be movedfreely laterallyzsuhstantially in line with-the motion or the movableanvil :64 :inits gaging or retracting .motions, :and' permits theabutment E5 'to engage the work and swing the work withitssupportingaplatform away from "engagement with the fixedwgaging :anvils'55 when "the gage is opened. The'i leaf "springs .75 maybe formed withthinned portionstiifi inwtheir arms 76 .toifacilitatethis .motion,'whi'le'the springs z'themselves are :xsufiiciently s'trongcto supportthework piece but with sufficient :flexureofrthe1in-turned 'lower ends.of the arms [Tpossi-blesto permit .axial adjustment or theWOIkWithllEttiOnitO the 'gaging'anvils. "The anem'bertfiz which-carriesthefixed :anvils may also be provided with "arcuate upstanding guide.portionsdiS, is'erving as' pilots. to facilitate the placing of theworkpiece.

In figures 7 rand8-a modification of the structure -shownin" Figures '4to dis illustrated in whichiinstead of carrying-the work supportrentirely. from the bed of the machine, ziit is supported partly. bythis'bed and partly by *the movable 'anvil-supporting arm. Asillustrated: in these figures,-the work'-supporting platform *Siliscarried' by'a pair of U-shaped leaf "spring hangers '9 I each having aninner arm 92 secured to the work support 9'6 and an outer'f'inturned arm93 secured to i the :top "face of the fixed anvil support 9d. 'lA'thirdspring hanger 95 similar to the hangers 9 I has its inner downwardlyextendingar-m 96 secured to the-work'support 9U,but'its outerdownwardlyand inwardly extending arm'97 is secured- "as "by screws- 9Bto the upper "face of the movable-anvil'fifi supported on the swingingarm lillil. in'Jthe-case of the other spring supports shown; eachmaybeprovided-with a thinned portion 102 to provide a portion of greaterflexibility to permit the desired free lateral motion of the worksupporting platform, while the substantially horizontal portion of theouter arm of each of the spring hangers provides for the desiredvertical motion to permit proper engagement of the anvils on the work.

From the foregoing description of certain embodiments of this inventionit will be evident to those skilled in the art that further embodimentsand various other modifications may be made without departing from thespirit or scope of the invention.

1 claim:

1. A gage comprising a bed, a plurality of gaging anvils carried by saidbed and relatively movtable towgage and release a work piece, at leastone of said anvils being stationary with respect to saidbed, a supportfor an article to be gaged, and means on said bed carrying said supportwith capability of swinging motion in the general direction of 'motionof said movable 'anv-il to carryvan-article thereon to and from gagingrelation to said stationary anvil.

2. A gage comprising a bed,& pluralityof gaging' anvilscarried bysaidbed and-relatively movable to sage and release a work piece, atleast oneof said anvils being stationary with'respect to said bed, a support foran article to be gaged, and means on said bed carrying said support withcapability-of'sw-inging motion'to carry an article thereonto'andfroinggagingrelation to said fixed anvil, said-support being yielda'bletransverse to its -direction of motion toward and from gaging relationto saidfixed anvil.

3.. A gage comprising a bed, a plurality of gaging anvils carried bysaid bed and relatively movable -to gage and release aworkpiece, atleast one of said anvils being stationary with respect to said bed, asupport for an article to b'e-gaged icy-said anvils, and hangerspivot/ally connecting saidsupport and bed :in position topermit'swinging motion of saidsupport to bring an article to be-gagedonsaid support to-sand from gaging relation to said fixed anvil.

l; A gage comprising a bed, a plurality of gaging anvils carried by saidbed -and relatively movableto ease and "release a work piecaat least oneof said .anvils being stationary with respect to-said bed, a support foranarticlezto be gagedby said anvils, and hangers pivotal ly connecting-'sai-d-support and bed in position to permit swinging motion of saidsupport to'bring an article to be gaged on said support to and fromgaging relation "to 'saidfixed anViLsa-id hangers-being :yieldable topermit "said support to move transverseto the swingingdirection.

ELTON S. CORNELL.

REFERENCES CITED The following referenoesare of record in the file "ofthis 'patent:

UNITED STATES "PATENTS Germany July'z, 1924.

